<template>
	<div id="app">
		<MyHeader @addTodo="addTodo" />
		<MyList :todos="todos"  />
		<MyFooter :todos=" todos" @checkAllTodo="checkAllTodo" @clearAllTodo="clearAllTodo"/>
		<img alt=" Vue logo" src="./assets/logo.png">
	</div>
</template>

<script>
	import MyHeader from './components/MyHeader.vue'
	import MyFooter from './components/MyFooter.vue'
	import MyList from "./components/MyList.vue"

	export default {
		name: 'App',
		components: {
			MyHeader,
			MyFooter,
			MyList
		},
		data(){
			return {
				// todos:[
				// 	{id:'001',title:'抽烟',done:true},
				// 	{id:'002',title:'喝酒',done:false},
				// 	{id:'003',title:'开车',done:true}
				// ]
				todos:JSON.parse(localStorage.getItem("todos")) || []
			}
		},methods: {
			// 添加一个todo
			addTodo(todoObj){
				this.todos.unshift(todoObj);
			},
			// 勾选或者取消勾选
			checkTodo(id){
				this.todos.forEach((todo) =>{
					if (todo.id==id) todo.done = !todo.done;
				})
				
			},
			deleteTodo(id) {
				this.todos = this.todos.filter(todo => todo.id!=id);
			},
			checkAllTodo(done) {
				this.todos.forEach((todo) => {
					todo.done = done;
				})
				
			},
			clearAllTodo(){
				// this.todos.forEach((todo)=>{
				// 	todo.done=false
				// })
				this.todos = this.todos.filter(todo => !todo.done)
				
			},
			updateTodo(id,title){
				this.todos.forEach((todo) => {
					if (todo.id == id) todo.title = title;
				})

			}
			
		},
		watch:{
			todos:{
				deep:true,
				handler(value) {
					localStorage.setItem("todos",JSON.stringify(value))
				}
			}

		},
		mounted(){
			this.$bus.$on("checkTodo", this.checkTodo)
			this.$bus.$on("deleteTodo", this.deleteTodo)
			this.$bus.$on("updateTodo", this.updateTodo)
		},
		beforeDestroy(){
			this.$bus.$off("checkTodo")
			this.$bus.$off("deleteTodo")
		}
		
	}
</script>

<style>


	#app {
		font-family: Avenir, Helvetica, Arial, sans-serif;
		-webkit-font-smoothing: antialiased;
		-moz-osx-font-smoothing: grayscale;
		text-align: center;
		color: #2c3e50;
		margin-top: 60px;
	}
		body {
			background: #fff;
		}
	
		.btn {
			display: inline-block;
			padding: 4px 12px;
			margin-bottom: 0;
			font-size: 14px;
			line-height: 20px;
			text-align: center;
			vertical-align: middle;
			cursor: pointer;
			box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
			border-radius: 4px;
		}
	
		.btn-danger {
			color: #fff;
			background-color: #da4f49;
			border: 1px solid #bd362f;
		}
		.btn-edit {
			color: #fff;
			background-color: skyblue;
			border: 1px solid rgb(103, 159, 180);
			margin-right: 5px;
		}
	
		.btn-danger:hover {
			color: #fff;
			background-color: #bd362f;
		}
	
		.btn:focus {
			outline: none;
		}
	
		.todo-container {
			width: 600px;
			margin: 0 auto;
		}
	
		.todo-container .todo-wrap {
			padding: 10px;
			border: 1px solid #ddd;
			border-radius: 5px;
		}
</style>
